Highlights

Apache Dubbo 3.3.6 introduces several important enhancements and stability improvements. This release adds new reactive and routing features, strengthens HTTP/2 support, and enhances configuration and metrics capabilities. It also includes a range of bug fixes and dependency upgrades to improve overall reliability and security.

What's Changed

Feature

• Add Affinity Router by @wcy666103 in https://github.com/apache/dubbo/pull/14787
• Support for Mutiny Reactive by @MoritzArena in https://github.com/apache/dubbo/pull/15537
• Add dubbo-spring6-security plugin by splitting dubbo-spring-security by @zrlw in https://github.com/apache/dubbo/pull/15494
• Add HTTP/2 server connection preface process by @zrlw in https://github.com/apache/dubbo/pull/15535
• Add http2 client connection preface process by @zrlw in https://github.com/apache/dubbo/pull/15436
• Support Preferred Network Interface via Spring Environment and Fix Early Host Resolution by @fu-cheng1 in https://github.com/apache/dubbo/pull/15604
• Add support for Zookeeper-based config center and metadata reporting in demo by @lingyufei in https://github.com/apache/dubbo/pull/15646
• Support method-level TPS in DefaultTPSLimiter by @lingyufei in https://github.com/apache/dubbo/pull/15679

Bugfix

• Fix nan problem by @songxiaosheng in https://github.com/apache/dubbo/pull/15586
• Fix concurrency issue of ConsumerConfigurationListener by @zrlw in https://github.com/apache/dubbo/pull/15707
• Fixed issue with unsupported message.proto file name by @nichanghao in https://github.com/apache/dubbo/pull/15655
• Fix uninitialized non-static final fields (potential NPE) in dubbo-remoting by @zrlw in https://github.com/apache/dubbo/pull/15602
• Fix mistaken deletion of reconnect interval by @oxsean in https://github.com/apache/dubbo/pull/15613
• Fix RpcServiceContext.localInvoke type inconsistency by @huangtaojava in https://github.com/apache/dubbo/pull/15536
• Fix MergedAnnotation null issue in Spring 5.x by @jkoChen in https://github.com/apache/dubbo/pull/15581
• Fix StreamObserver call sequence issue (onCompleted without onNext) by @RainYuY in https://github.com/apache/dubbo/pull/15466
• Fix NetUtils to ignore link-local addresses by @cyclinder in https://github.com/apache/dubbo/pull/14793
• Fix issue where WrapperTest failed due to missing parent method names by @Hussain-Safwan in https://github.com/apache/dubbo/pull/15683
• Fix Zookeeper download URL and timeout handling by @zrlw in https://github.com/apache/dubbo/pull/15697
• Fix Mutiny race condition issue by @MoritzArena in https://github.com/apache/dubbo/pull/15662

Code Enhancement

• End “read/write” combination early to improve performance by @frozenNoob in https://github.com/apache/dubbo/pull/15666
• Remove redundant tests and deprecated author tags by @RainYuY in https://github.com/apache/dubbo/pull/15654
• Add multi-JDK testing to PR workflow by @WangzJi in https://github.com/apache/dubbo/pull/15542
• Cache marked type to optimize SerializeSecurityConfigurator by @zrlw in https://github.com/apache/dubbo/pull/15500
• Replace ConcurrentHashMap#computeIfAbsent to avoid potential deadlock by @zrlw in https://github.com/apache/dubbo/pull/15456
• Improve test stability (e.g., AbortPolicyWithReportTest, MetricsSupportTest) by @zrlw
• Cleanup redundant version declarations and deprecated mirror settings by @zrlw in https://github.com/apache/dubbo/pull/15667
• Optimize TriRpcStatus by adding HTTP status code to its description by @zrlw in https://github.com/apache/dubbo/pull/15708

Dependency Upgrade

• grpc.version: 1.72.0 → 1.73.0 (#15418, #15550)
• protobuf-java: 3.25.5 → 3.25.8 (#15424)
• netty4_version: 4.2.1.Final → 4.2.2.Final (#15443)
• io.micrometer:micrometer-bom: 1.15.0 → 1.15.1 (#15462)
• io.micrometer:micrometer-tracing-bom: 1.5.0 → 1.5.1 (#15461)
• org.apache.groovy:groovy: 4.0.26 → 4.0.27 (#15419)
• org.springframework:spring-web: 6.2.7 → 6.2.8 (#15458)
• org.apache.dubbo:hessian-lite: 4.0.3 → 4.0.4 (#15684)
• org.apache.commons:commons-exec: 1.4.0 → 1.5.0 (#15408)
• junit_platform_version: 1.12.2 → 1.13.1 (#15440)
• bcprov: jdk15on → jdk18on (#15434)

Contributors

Dubbo would like to thank the following contributors for their contributions to this release: @AlbumenJ, @zrlw, @RainYuY, @heliang666s, @oxsean, @wcy666103, @frozenNoob, @lingyufei, @MoritzArena, @fu-cheng1, @nichanghao, @songxiaosheng, @huangtaojava, @Hussain-Safwan, @cyclinder, @co63oc, @WangzJi, @DustinQiao, @fantiq, @jkoChen, @AROP-REPLICATION

New Contributors

• @MoritzArena made their first contribution in https://github.com/apache/dubbo/pull/15537
• @lingyufei made their first contribution in https://github.com/apache/dubbo/pull/15646
• @Hussain-Safwan made their first contribution in https://github.com/apache/dubbo/pull/15683
• @frozenNoob made their first contribution in https://github.com/apache/dubbo/pull/15666
• @fu-cheng1 made their first contribution in https://github.com/apache/dubbo/pull/15604

Full Changelog: https://github.com/apache/dubbo/compare/dubbo-3.3.5...dubbo-3.3.6